fix: improve error handling in rate limiter and remove unnecessary logging

relay/adaptor/gemini/main.go

@@ -424,8 +424,6 @@ func StreamHandler(c *gin.Context, resp *http.Response) (*model.ErrorWithStatusC
 		data = strings.TrimPrefix(data, "data: ")
 		data = strings.TrimSuffix(data, "\"")
 
-		fmt.Printf(">> gemini response: %s\n", data)
-
 		var geminiResponse ChatResponse
 		err := json.Unmarshal([]byte(data), &geminiResponse)
 		if err != nil {

relay/adaptor/openai/token.go

@@ -77,6 +77,7 @@ func getTokenNum(tokenEncoder *tiktoken.Tiktoken, text string) int {
 	return len(tokenEncoder.Encode(text, nil, nil))
 }
 
+// CountTokenMessages counts the number of tokens in a list of messages.
 func CountTokenMessages(ctx context.Context,
 	messages []model.Message, actualModel string) int {
 	tokenEncoder := getTokenEncoder(actualModel)